Nanoparticles of undoped and cobalt-doped copper ferrite Cu_1-xCo_xFe₂O₄ (x = 0.2, 0.4, 0.6, 0.8, and 1.0) were successfully synthesized by a co-precipitation method. The influence of Co²⁺ substitutions on the structure, morphological, optical, and magnetic properties of Cu_1-xCo_xFe₂O₄ nanoferrites was studied. The crystallite size found by XRD increased from ∼ 10 to∼ 25 nm. The lattice parameter increased from 8.332 to 8.371 Å with increasing the Co²⁺ content. The FTIR spectra of Cu_1-xCo_xFe₂O₄ display two strong absorption bands in the range of 400–200 cm⁻¹. The band gap energy of nanoferrites is found to decrease from 3.65 to 3.20 eV with an increase in the content of Co²⁺ ions. It has been observed that the luminescence intensity decreases in copper ferrite matrices with an increase in the ratio of Co²⁺. The results show the magnetic properties of copper ferrite are significantly affected by the doping amount of Co²⁺ ions. The saturation magnetization increases with increasing cobalt ion concentration as indicated in the M-H loops.

 通过共沉淀法成功地合成了未掺杂和掺杂钴的铜铁氧体Cu _{1- x} Co _x Fe ₂ O ₄（x = 0.2、0.4、0.6、0.8和1.0）的纳米粒子。研究了Co ²⁺取代对Cu _{1- x} Co _x Fe ₂ O ₄纳米铁氧体的结构，形貌，光学和磁性的影响。通过XRD发现的微晶尺寸从〜10增加到〜25nm。随着Co ²⁺含量的增加，晶格参数从8.332增加到8.371Å 。Cu _{1- x} Co的FTIR光谱_x Fe ₂ O ₄在400–200 cm ^-1范围内显示两个强吸收带。发现随着Co ²⁺离子含量的增加，纳米铁氧体的带隙能从3.65 eV降低到3.20 eV。已经观察到，随着Co ²⁺比率的增加，铜铁氧体基质中的发光强度降低。结果表明，Co ²⁺离子的掺杂量显着影响铜铁氧体的磁性。如MH回路所示，饱和磁化强度随着钴离子浓度的增加而增加。